# AD 47-50-12: Stabilizer attachment fitting

- Type: Airworthiness directive
- Status: Current
- Products: Univair 108 and 108-1
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 600 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/07B0BB4FD86861DA86256A4D005DFD4F.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/47-50-12

## The airworthiness directive

47-50-12 STINSON: Applies to Model 108 Series Serial Numbers 1 through 3500. Compliance required every 100 hours of operation. Inspection of the stabilizer leading edge attachment to the fuselage should be made for fatigue cracks, after each 100 hours of operation. If fatigue cracks are present, reinforcements to the stabilizer fitting should be added. Inspection may be discontinued after reinforcement is installed. (Stinson Service Bulletin No. 254 dated September 5, 1947, covers this same subject.)

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-767](https://openairdocs.org/tcds/A-767): Univair Aircraft Corporation; names 2 of 5 models: 108, 108-1

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 600 (600 by airframe model, 0 by engine model)
- Makers: Stinson 551, Universal Stinson 47, Consolidatedvultee Acft 2

Models with the most aircraft:

- [Stinson 108-1](https://openairdocs.org/model/stinson-108-1): 338 aircraft (airframe model)
- [Stinson 108](https://openairdocs.org/model/stinson-108): 213 aircraft (airframe model)
- [Universal Stinson 108-1](https://openairdocs.org/model/universal-stinson-108-1): 28 aircraft (airframe model)
- [Universal Stinson 108](https://openairdocs.org/model/universal-stinson-108): 19 aircraft (airframe model)
- [Consolidatedvultee Acft 108](https://openairdocs.org/model/consolidatedvultee-acft-108): 2 aircraft (airframe model)

All 5 models: https://openairdocs.org/ad/47-50-12/models.md
Every aircraft: https://openairdocs.org/ad/47-50-12/aircraft.md

Its text cites no advisory circulars or STCs.

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